Opus Context

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Opus Context

Teaches Claude Code Opus 4.6 to use its full 1M token context window instead of defaulting to conservative behaviors designed for smaller models.

Summary

Claude Code defaults to reading files in small chunks, delegating searches to subagents, and re-reading files it already has in context. These habits make sense for 200K-token models but waste Opus 4.6's capacity. This plugin provides always-on behavioral rules that override those defaults: read whole files, read directly instead of delegating, pre-load dependencies before editing, and track what's already loaded.

Principles

[P1] Read More, Not Less: With 1M tokens, a 500-line file costs ~0.1% of context. The cost of missing context from partial reads exceeds the cost of loading the full file.

[P2] Own Your Context: Read files directly rather than delegating to subagents that return summaries. Summaries lose nuance; source code doesn't.

[P3] Load Before You Leap: Read a file's dependency graph (imports, callers, tests) before editing it.

[P4] Budget Awareness: Read aggressively early; shift to selective reading as context fills.

Requirements

None beyond Claude Code with Opus 4.6 (1M context).

Installation

/plugin marketplace add L3DigitalNet/Claude-Code-Plugins
/plugin install opus-context@l3digitalnet-plugins

For local development:

claude --plugin-dir ./plugins/opus-context

Usage

Always-on. Activates automatically via skill description matching. No manual invocation needed.

Optional: add to ~/.claude/CLAUDE.md:

## Context Management
When running on Opus 4.6 (1M context), always consult the `opus-context:deep-context` skill for file reading, delegation, and pre-loading decisions.